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Finding the Fourth Proportional to 90,110.86, 135,774.56 and 74,659.70

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Solution

The fourth proportional to 90,110.86, 135,774.56 and 74,659.70 is: 112,493.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,110.86 : 135,774.56 = 74,659.70 : x
  2. Step 2: Convert to fraction form
    90,110.86/135,774.56 = 74,659.70/x
  3. Step 3: Cross multiply
    90,110.86x = 135,774.56 × 74,659.70
  4. Step 4: Simplify right side
    90,110.86x = 10,136,888,443.32
  5. Step 5: Solve for x
    x = 10,136,888,443.32/90,110.86
  6. Step 6: Final answer
    x = 112,493.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.